|The generalization of alkali-metal vapors in a 150-kilowatt forced-circulation flash vaporization facility - Goldman, L. J.|
No Abstract Available
Keywords: ALKALI METALS; METAL VAPORS; VAPORIZING
|Vaporizing - Das Verdunsten von Pflanzeninhaltsstoffen ohne Rauch - Referat von Frank Fuchs - Entheovision 4 - Medienprojekt PSI-TV|
Vaporizing - Das Verdunsten von Pflanzeninhaltsstoffen ohne Rauch Eine Praktische Einführung in die sinnvolle Benutzung eines Vaporizers. Am praktischen Beispiel zeigt Frank Fuchs, wie ein Vaporizer zu benutzen ist. Im Gespräch mit den Teilnehmern werden oft getätigte Fehler erkannt und korrigiert. Es werden auch Hinweise zur Pflege eines solchen Gerätes gegeben. Ebenso im Gespräch wird über die Möglichkeiten und deren Beziehung zu den Erwartungen der Nutzer auf geklärt...
Keywords: vaporizing; frank fuchs; verdampfen; aromatherapie
|Solid Freeform Fabrication of Continuous Fiber Reinforced Composites for Propulsion Applications - Vaidyanathan, R.|
Monolithic ceramics lack the fracture toughness necessary to be considered for propulsion related applications. To be used for such applications, materials must possess low density, high elastic modulus, a low thermal expansion coefficient, high thermal conductivity, excellent erosion and oxidation/corrosion resistance, and flaw-insensitivity. They will in many cases also be required to possess the ability to be joined, to survive thermal cycling and multi-axial stress states, and for reusable a...
Keywords: IMPACT TESTS; CALCIUM SILICATES; VAPORIZING; INTERFEROMETERS; ISOTOPE RATIOS; COMPUTERIZED SIMULATION
|A THEORY OF CALCULATION OF FLUTTER VIBRATIONS IN SUBSONIC FLOWS - ROTH, W|
CRITICAL FLUTTER VELOCITY FOR A MEMBRANE IN A NONCONSERVATIVE SYSTEM IS CONSIDERED. IT IS SHOWN THAT THE DAMPING FORCES HAVE A DESTABILIZING EFFECT AND THAT A DISCONTINUITY APPEARS IN THE STABILITY CRITERION WHICH DEPENDS ON THE DAMPING COEFFICIENT AND IS CHARACTERISTIC OF NONCONSERVATIVE SYSTEMS. BY MEANS OF THIS THEORY, THE FLUTTER OF WEATHER VANES OR SAILS, AS WELL AS THE RELATED TRAVELING TRANSVERSE WAVES, CAN BE EXPLAINED.
Keywords: ATMOSPHERIC DENSITY; LUMINANCE; METEOROIDS; MATHEMATICAL MODELS; METEOR TRAILS; TURBULENCE; VAPORIZING
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|ALI (Autonomous Lunar Investigator): Revolutionary Approach to Exploring the Moon with Addressable Reconfigurable Technology - Clark, P. E.|
Addressable Reconfigurable Technology (ART) based structures: Mission Concepts based on Addressable Reconfigurable Technology (ART), originally studied for future ANTS (Autonomous Nanotechnology Swarm) Space Architectures, are now being developed as rovers for nearer term use in lunar and planetary surface exploration. The architecture is based on the reconfigurable tetrahedron as a building block...
Keywords: SPACE WEATHERING; SPACE LABORATORIES; NEAR INFRARED RADIATION; METAL SURFACES; MAGNETIC PROPERTIES; SPECTRAL REFLECTANCE; VAPORIZING
|Transonic flutter of control surfaces - Erickson, A. L|
No Abstract Available
Keywords: FLASHING (VAPORIZING); TEST EQUIPMENT; LIQUID-VAPOR INTERFACES; PRESSURE GRADIENTS; TANKS (CONTAINERS)
|Visions of Automation and Realities of Certification - Hayhurst, Kelly J.|
Quite a lot of people envision automation as the solution to many of the problems in aviation and air transportation today, across all sectors: commercial, private, and military. This paper explains why some recent experiences with complex, highly-integrated, automated systems suggest that this vision will not be realized unless significant progress is made over the current state-of-the-practice in software system development and certification.
Keywords: THERMODYNAMICS; VOLATILITY; SILICON DIOXIDE; SILICON NITRIDES; OXYGEN SUPPLY EQUIPMENT; VAPORIZING; WATER VAPOR
|DESIGN AND OPERATIONAL PERFORMANCE OF A 150-KILOWATT SODIUM FLASH-VAPORIZATION FACILITY - Goldman, L. J.|
Design and operational performance of sodium flash vaporization facility
Keywords: ENERGY CONVERSION; VAPORIZATION; FLASH; PILOT PLANTS; SODIUM; VAPORIZING; ENERGY CONVERSION; FLASH; PILOT PLANT; SODIUM
|On the calculation of three dimensional laminar boundary layer flows - Fillo, J. A.|
An approximation which reduces the computation of three dimensional, laminar, compressible, boundary layer equations to the problem of solving two dimensional type boundary layer equations is presented. A comparison of this method with a fully three dimensional boundary layer calculation is provided.
Keywords: LASER HEATING; MASS TRANSFER; METAL VAPORS; VAPORIZING; LIQUID METALS; METAL SURFACES
|Experimental studies on the theory of W. Ritz on transverse vibrations of square plates - Lemke, A|
Ritz method for solving problems on transverse vibrations on plane elastic plates, and tables on coefficients of elasticity
Keywords: CONDENSATES; METAL FILMS; MICROHARDNESS; TENSILE STRENGTH; HIGH STRENGTH; IRON; NICKEL; VACUUM DEPOSITION; VAPORIZING
|From pattern to process: The strategy of the Earth Observing System: Volume 2: EOS Science Steering Committee report - NON|
The Earth Observing System (EOS) represents a new approach to the study of the Earth. It consists of remotely sensed and correlative in situ observations designed to address important, interrelated global-scale processes. There is an urgent need to study the Earth as a complete, integrated system in order to understand and predict changes caused by human activities and natural processes. The EOS approach is based on an information system concept and designed to provide a long-term study of the E...
Keywords: LIQUID OXYGEN; PERFORMANCE TESTS; SEALS (STOPPERS); TURBINE PUMPS; FLUID FILMS; PRESSURE REDUCTION; VAPORIZING
|PERFORMANCE OF A SINGLE FUEL-VAPORIZING COMBUSTOR WITH SIX INJECTORS ADAPTED FOR GASEOUS HYDROGEN - Smith, A. L.|
Single fuel-vaporizing combustor with injectors adapted for gaseous hydrogen
Keywords: COMBUSTION CHAMBERS; HYDROGEN; INJECTOR; VAPORIZATION; FUEL INJECTION; HYDROGEN; INJECTORS; VAPORIZING; WEAR; COMBUSTOR; FUEL INJECTION; GAS
|Stressed-Oxidation Lifetime of Different SiC Fiber, CVI Matrix SiC Minicomposites in Air - Morscher, Gregory N.|
The stressed-oxidation lifetime properties of several minicomposites composed of single fiber tows with a CVI SiC matrix were compared. The minicomposites were made up of Nicalon(Tm) and Hi-Nicalon(Tm) SiC fibers with carbon or BN interphases. Constant load stress-rupture tests were performed between 600 and 13000 C in air for all of the minicomposite systems. Cyclic load testing was performed on the Hi-Nicalon minicomposite systems...
Keywords: CHEMICAL ANALYSIS; VAPORIZING; RECESSION; BOUNDARY LAYERS; CHEMICAL REACTIONS; VOLATILITY; THERMOCHEMISTRY; SILICON DIOXIDE; FUEL COMBUSTION; CHEMICAL PROPERTIES; CHEMICAL TESTS; WATER VAPOR
|Vaporization of tantalum-carbide - hafnium- carbide solid solutions at 2500 deg to 3000 deg k - Deadmore, D. L|
Vaporization of tantalum carbide-hafnium carbide solid solutions at high temperatures
Keywords: CARBIDES; VAPORIZATION; ELECTROSTATIC PROBES; HAFNIUM CARBIDES; HIGH TEMPERATURE; SOLID SOLUTIONS; TANTALUM CARBIDES; VAPORIZING; HAFNIUM CARBIDE; TANTALUM CARBIDE
|Evaluation of selected chemical processes for production of low-cost silicon, phase 3 - Blocher, J. M., Jr.|
The construction of the 50 MT Si/year experimental process system development unit was deferred until FY 1980, and the fluidized bed, zinc vaporizer, by-product condenser, and electrolytic cell were combined with auxiliary units, capable of supporting 8-hour batchwise operation, to form the process development unit (PDU), which is scheduled to be in operation by October 1, 1979. The design of the PDU and objectives of its operation are discussed...
Keywords: AIRCRAFT PARTS; THERMODYNAMICS; VAPORIZING; COMBUSTION CHAMBERS; GAS TURBINES; ATOMIZING; COMBUSTION CHEMISTRY; COMBUSTION PHYSICS; OPERATIONAL PROBLEMS; RESEARCH MANAGEMENT; THERMOCHEMISTRY
|MSFC Stream Model Preliminary Results: Modeling Recent Leonid and Perseid Encounters - Cooke, William J.|
The cometary meteoroid ejection model of Jones and Brown (1996b) was used to simulate ejection from comets 55P/Tempel-Tuttle during the last 12 revolutions, and the last 9 apparitions of 109P/Swift-Tuttle. Using cometary ephemerides generated by the Jet Propulsion Laboratory s (JPL) HORIZONS Solar System Data and Ephemeris Computation Service, two independent ejection schemes were simulated. In the first case, ejection was simulated in 1 hour time steps along the comet s orbit while it was withi...
Keywords: SOLAR CELLS; NEAR INFRARED RADIATION; ELECTROMAGNETIC ABSORPTION; QUANTUM DOTS; POLYETHYLENES; CARBON NANOTUBES; WALLS; COMPOSITE MATERIALS; VAPORIZING; SUBSTRATES; SPRAYERS
|Experimental investigation of droplet vaporization under conditions of high temperatures and pressures (eksperimental'noye issledovaniye ispareniya kapel' v usloviyakh vysokikh temperatur i davleniya) - Petrazhitskiy, G. B|
High temperature and pressure droplet vaporization in gas stream
Keywords: DROPS (LIQUIDS); GAS STREAM; VAPORIZATION; ETHYL ALCOHOL; GAS STREAMS; HIGH PRESSURE; HIGH TEMPERATURE; KEROSENE; REYNOLDS NUMBER; VAPORIZING; DROP
|Inlet and airframe compatibility for a V/STOL fighter/attack aircraft with top-mounted inlets - Durston, D. A.|
Aerodynamic force and inlet pressure data are obtained for 9.5 force and pressure models of a V/STOL fighter/attack aircraft configuration with top mounted twin inlets. Data are presented from tests conducted in the Ames Unitary Wind Tunnels at Mach numbers of 0.6, 0.9, and 1.2 at angles of attack up to 27 deg. and angles of sideslip up to 12 deg. Trimmed aerodynamic characteristics and inlet performance are compared for three different leading edge extension (LEX) configurations...
Keywords: AEROSOLS; VAPORIZING; CHEMICAL ANALYSIS; CHEMICAL COMPOSITION; MASS SPECTROSCOPY; PARTICLE BEAMS; ELECTRON BOMBARDMENT; ION SOURCES; IONIZATION; PULSED LASERS
|Extended atmospheres of outer planet satellites and comets - Smyth, William H.|
A major model documentation paper for cometary gas coronae and a second paper successfully applied the model to simulate the hydrogen Lyman-alpha coma of comet Kohoutek were completed and are discussed. New and very exciting data for the hydrogen distribution in the Saturn system obtained form earlier unreduced Voyager 1 and Voyager 2 data are preliminarily reviewed. This new data opens up a whole new series of investigations and indicate that Saturn's corona plays a major role in supplying hydr...
Keywords: CERAMICS; SENSITIVITY; SILICON CARBIDES; SILICON NITRIDES; VAPORIZING; VOIDS; FRACTOGRAPHY; NONDESTRUCTIVE TESTS; PHOTOACOUSTIC MICROSCOPY; DEFECTS; DIGITAL SYSTEMS; INCLUSIONS; MICROCRACKS; RADIOGRAPHY
|A high-input impedance differential millivolt meter for use with solid ceramic oxygen electrolyte cells - Williams, R. J.|
Design factors are given for a high-input impedance differential millivolt meter designed, built, and tested as an inexpensive solid-state electronic system for use in measuring the electromotive force from solid ceramic oxygen electrolyte cells. A schematic diagram is included.
Keywords: LUNAR COMPOSITION; THERMODYNAMICS; VACUUM MELTING; VAPORIZING; DYNAMIC MODELS; ENVIRONMENT MODELS; MATERIAL ABSORPTION; MOON; REACTION KINETICS; THERMAL ABSORPTION
|Experiments in Nonlinear Adaptive Control of Multi-Manipulator, Free-Flying Space Robots - Chen, Vincent Wei-Kan|
Sophisticated robots can greatly enhance the role of humans in space by relieving astronauts of low level, tedious assembly and maintenance chores and allowing them to concentrate on higher level tasks. Robots and astronauts can work together efficiently, as a team; but the robot must be capable of accomplishing complex operations and yet be easy to use. Multiple cooperating manipulators are essential to dexterity and can broaden greatly the types of activities the robot can achieve; adding adap...
Keywords: FLASHING (VAPORIZING); SELF PROPAGATION; EXCITATION; ELECTROSTATICS; THUNDERSTORMS; LUMINOSITY; ELECTRIC FIELDS; LIGHT EMISSION; NITROGEN; SPECTRUM ANALYSIS; PHOTOMETRY; ATMOSPHERIC CONDUCTIVITY; MATHEMATICAL MODELS
|Determination of the thermal conductivity, the specific heat and the weight by volume /gross density/ of insulations for rocket tanks filled with liquid hydrogen. Part 1 - Description of measurement procedure - Koglin, B.|
Thermal conductivity, specific heat, and weight by volume of insulating foams for rocket tanks filled with liquid hydrogen
Keywords: CRYOGENIC ROCKET PROPELLANTS; VAPORIZING; WALL TEMPERATURE; FOAMS; INSULATION; LIQUID HYDROGEN; PROPELLANT STORAGE; SPECIFIC HEAT; STORABLE PROPELLANTS; TEMPERATURE DISTRIBUTION; THERMAL CONDUCTIVITY
|Altitude-Wind-Tunnel Investigation of Performance of Several Propellers on YP-47M Airplane at High Blade Loadings - Saari, Martin J.|
An altitude-wind-tunnel investigation has been made to determine the performance of Hamilton Standard 6507A-2 four-blade and three-blade propellers on a YP-47M airplane at high blade loadings and high engine powers. Characteristics of the four-blase propeller were obtained for a range of power coefficients from 0.10 to 1.00 at free-stream Mach numbers of 0.20, 0.30, 0.40. Characteristics of the three-blade propeller were obtained for a range of power coefficients from 0.30 to 1.00 at a free-stre...
Keywords: BURNERS; VELOCITY DISTRIBUTION; FUEL INJECTION; GAS STREAMS; PRESSURE DISTRIBUTION; RAMJET ENGINES; AIR FLOW; SUPERSONIC JET FLOW; COMBUSTION EFFICIENCY; PROPANE; FRICTION FACTOR; IGNITION; VAPORIZING
|Application to fluid dynamics of the theory of reversible heat addition - Baldwin, Barrett S., Jr|
No Abstract Available
Keywords: ABLATION; MASS TRANSFER; NONLINEAR EQUATIONS; THERMAL BOUNDARY LAYER; AERODYNAMIC HEAT TRANSFER; AERODYNAMIC HEATING; BLUNT BODIES; CONDUCTIVE HEAT TRANSFER; STAGNATION POINT; UNSTEADY STATE; VAPORIZING; ABLATIVE MATERIALS
|Numerical Simulation of a Flap-Edge Flowfield - Streett, C. L|
In this paper we develop an approximate computational framework for simulation of the fluctuating flowfield associated with the complex vortex system seen at the side edge of a flap in a multielement high-lift airfoil system. The eventual goal of these simulations is to provide an estimate of the spectral content of these fluctuations, in order that the spectrum of the noise generated by such flowfields may be estimated...
Keywords: GAS TURBINE ENGINES; FLAME PROPAGATION; FUEL SPRAYS; SECONDARY INJECTION; FLAME HOLDERS; VAPORIZING; COMBUSTION; COMPUTATIONAL FLUID DYNAMICS; MIXERS; FUEL INJECTION; CONVERGENT-DIVERGENT NOZZLES; COMBUSTION CHAMBERS
|Pellet bed reactor for nuclear propelled vehicles: Part 1: Reactor technology - El-Genk, Mohamed S|
The pellet bed reactor (PBR) for nuclear propelled vehicles is briefly discussed. Much of the information is given in viewgraph form. Viewgraphs include information on the layout for a Mars mission using a PBR nuclear thermal rocket, the rocket reactor layout, the fuel pellet design, materials compatibility, fuel microspheres, microsphere coating, melting points in quasibinary systems, stress analysis of microspheres, safety features, and advantages of the PBR concept.
Keywords: ABUNDANCE; GEOLOGICAL SURVEYS; GEOMORPHOLOGY; HYPERVELOCITY IMPACT; LUNAR ROCKS; SOLUBILITY; VAPORIZING; VOLATILITY; CHEMICAL FRACTIONATION; GEOCHEMISTRY; IMPACT MELTS; METEORITE CRATERS; METEORITES; PROJECTILES; SILICATES; AUSTRALIA
|A Rayleigh-Ritz analysis methodology for cutouts in composite structures - Russell, Steven G|
A new Rayleigh-Ritz stress analysis methodology that was developed for composite panels containing cutouts is described. The procedure, which makes use of a general assumed displacement field, accommodates circular and elliptical cutouts in biaxially loaded rectangular composite panels. Symmetric integral padups around the cutout can be included in the analysis. Benchmark results are presented to demonstrate the accuracy of the technique...
Keywords: HYPERVELOCITY IMPACT; TRAILING EDGES; ALUMINUM; FLAKES; GOLD; IMPACTORS; INTERPLANETARY DUST; POPULATIONS; VAPORIZING; LEADING EDGES; LONG DURATION EXPOSURE FACILITY; METAL SURFACES; METEORITE CRATERS; MICROMETEOROIDS; PROJECTILES; RESIDUES; SPACE DEBRIS
|Tectonics and volcanism of Eastern Aphrodite Terra: No subduction, no spreading - Hansen, Vicki L.|
Eastern Aphrodite Terra is approximately equal in size to the western North American Cordillera, from Mexico to Alaska. Its size and unique landforms make it an important area for understanding the tectonics of Venus, yet models for its formation are diametrically opposed. This region is part of the Equatorial Highlands, which was proposed as a region of lithospheric thinning, isostatic uplift, and attendant volcanism...
Keywords: CRYOGENIC FLUIDS; DROPS (LIQUIDS); GAS ATOMIZATION; HEAT TRANSFER COEFFICIENTS; DROP SIZE; FUEL SPRAYS; GAS JETS; LIQUID NITROGEN; MULTIPHASE FLOW; VAPORIZING; ATOMIZERS; DRAG COEFFICIENTS
|Study of modeling and evaluation of remote manipulation tasks with force feedback - Hill, J. W|
The use of time and motion study methods to evaluate force feedback in remote manipulation tasks are described. Several systems of time measurement derived for industrial workers were studied and adapted for manipulator use. A task board incorporating a set of basic motions was designed and built. Results obtained from two subjects in three manipulation situations for each are reported: a force-reflective manipulator, a unilateral manipulator, and the unaided human hand...
Keywords: AIRCRAFT ENGINES; COMBUSTION PRODUCTS; DESIGN ANALYSIS; ENGINE DESIGN; ENGINES; EXHAUST GASES; FLAME HOLDERS; FUEL-AIR RATIO; IGNITION; MIXTURES; STRUCTURAL DESIGN; COMBUSTION CHAMBERS; CONFERENCES; FUEL COMBUSTION; GAS TURBINE ENGINES; PREMIXED FLAMES; TECHNOLOGY ASSESSMENT; VAPORIZING; COMBUSTION EFFICIENCY
|RANDOM PROCESSES IN ELECTRICAL AND MECHANICAL SYSTEMS - LEBEDEV, V. L|
THIS BOOK DEALS WITH STATIONARY AND NONSTATIONARY RANDOM PROCESSES IN LINEAR SYSTEMS AND IN INERTIALESS NONLINEAR SYSTEMS WHICH HAVE EITHER ONE OR SEVERAL INPUTS AND OUTPUTS. THE APPLICATION OF THE MATHEMATICAL METHODS EXPOUNDED IS ILLUSTRATED BY MANY PRACTICAL EXAMPLES RELATED TO VARIOUS PHYSICAL AND ENGINEERING PROBLEMS.
Keywords: PROPELLANTS; ROCKET ENGINES; LIQUID PHASES; LENGTH; INJECTORS; HYDRAZINES; FLUORINE; EXHAUST VELOCITY; EFFICIENCY; DECOMPOSITION; COMBUSTION EFFICIENCY; DESIGN ANALYSIS; EXPERIMENTATION; PERFORMANCE TESTS; HEAT TRANSFER; HEAT OF VAPORIZATION; ROCKET ENGINE DESIGN; VAPORIZING; THRUST
|Mission activities planning for a Hermes mission by means of AI-technology - Pape, U.|
Mission Activities Planning is a complex task to be performed by mission control centers. AI technology can offer attractive solutions to the planning problem. This paper presents the use of a new AI-based Mission Planning System for crew activity planning. Based on a HERMES servicing mission to the COLUMBUS Man Tended Free Flyer (MTFF) with complex time and resource constraints, approximately 2000 activities with 50 different resources have been generated, processed, and planned with parametric...
Keywords: DROPS (LIQUIDS); COMBUSTION STABILITY; DROP SIZE; FLUID JETS; LAMINAR FLOW; TURBULENT FLOW; UNSTEADY FLOW; LIQUID PROPELLANT ROCKET ENGINES; PARTICLE IMAGE VELOCIMETRY; SPRAY CHARACTERISTICS; SPRAYING; TEMPERATURE MEASUREMENT; TURBULENCE; VAPORIZING; AERODYNAMIC DRAG